He was one of the organizers of summer camps "Otokultivator" on island Vis (together with URK Močvara & EASA Croatia) and SummerSource (together with TacticalTech).

Marcell participated in curating or producing mi2 yearly exhibitions I Am Still Alive (2001) and re:Con (2002), free culture, science and technology festival Freedom to creativity! (2005) and in conceptual exhibition System.hack() (2006). He is a member of Creative Commons Team Croatia.

While in Zagreb Marcell hangs out in Hacklab in mama, in Belgrade runs Wonder of technology/Čudo tehnike, Hackers lenses/Hakerska optika and Programming for non-programmers at Faculty of Media and Communication, from 2011-2012 worked on research Ruling Class Studies at Jan Van Eyck in Maastricht, a research continued in 2015 as PhD at Digital Cultures Research Lab. In 2013 did fellowship at Akademie Schloss Solitude in Stuttgart. These days advocates for and works on Public library.

He sings, dances, tells the stories and makes music as Nenad Romic za Novyi Byte.

Projektinfo

The Artist/hacker Marcell Mars agues that the concept of the public library is right up there with public education, public health care and the scientific method as a both a great achievement and social good to which almost everybody subscribes to as a non-negotiable public good. Taking the concept of the public library as a benchmark against which to measure what society and culture should be like and an indication that an economy of contribution is possible.